Improvement in hot-air registers



C. B. SAWYER.

Hot Air Register. I No. 34,783. v I Patented March 25, 1862.

UNITED STATES PATENT OFFICE.

CHARLES B. SAWYER, OF FITCHBURG, MASSACHUSETTS.

IMPROVEMENT IN HOT-A|R REGISTER S.

Specification forming part of Letters Patent No. 34,783, dated March 25, 1862.

To all whom it may concern.-

Be it known that I, CHARLES B. SAWYER, of Fitchburg, in the county of Worcester and State of Massachusetts, have invented a certain new and useful Improvement in Registers, &c., for the Hot-Air Pipes of Heaters; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, making a part of this specifica tion, in which- Figure 1 is a vertical section of my invention, taken .in the line w 68, Fig. 2; Fig. 2, a

. horizontal section of the same, taken in the line y 1 Fig. 1.

Similar letters of reference indicate corresponding parts in the two figures.

This invention consists in combining a water-chamber with a hot-air register, substantially as hereinafter fully shown and described.

To enable those skilled in the art to fully understand and construct my invention, I will proceed to describe it.

A represents the register box or pan, which is of quadrilateral form and hasits top plate a perforated or formed of open scroll work to admit of the heated air passing through it. The box Ainay be of cast metal, and it has a cylindrical flange B cast with it, which proj ects down from its bottom a suitable distance. This flange is of such diameter that it may receive the hot-air pipe, which is of cylindrical form and is designed to fit snugly on the flange B.

The box A is to be fitted in the floor of the apartment with its upper surface flush with the floor, as usual, and within the flange B there is placed a circular damper or valve B, which is hung on pivots or a central shaft a, and may be opened and closed by gears 19 b and a sliding rack c, all of which are shown by dotted lines in Fig. 1. Other means, however, may be employed for operating the damper.

Within the register box or pan A there is placed an upright cylindrical flange C, which may be equal in diameter to the flange B and in line with it. This flange C does not extend up quite as high as the top of the box A, and it serves as a partition in said box to form a water-chamberD. The flange C may be cast with the box A and flange B, or be made sepa rately and then attached. The flange B may also be cast or made separately and then at- -tached to the box A; but the most desirable mode of manufacture would be to cast the box A and the two cylindrical flanges B C in one piece. Y

The chamber D is supplied with a requisite quantity of water, and as the heated air passes into the box A it will take up moisture from the chamber D as much as it requires and no more, it being well ascertained that air, whether hot or cold, will when lacking a requisite quantity of moisture supply itself with a sufficiency only if allowed to be brought in contact with it.

Water-chambers have been used in connection with air-heating furnaces, but so far as I am aware they have invariably been placed within the heater or furnace and in suchposition as to reach at times the boiling-point. When this occurs, the heated air becomes loaded with steam, the latter being carried along into the apartment and rendering the latter damp and consequently unwholesome; but by having the water-chamber D placed in the register-boxA said chamber is entirely too remote from the heater or furnace to admit of the water reaching the boiling-point, and hence the difficulty alluded to is obviated. By having the cylindrical flange B directly connected to the registerbox A and the circular damper or valve B fitted therein, I avoid the comparatively expensive valves hitherto employed in the register box or pan A.

I would remark that the water-chamber D- serves effectually as a preventative against.

fire. The Wood-work in which the register is set cannot be ignited from the hot=air pipe, a contingency which not unfrequently occurs with the ordinary registers.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

Combining a water-chamber with a hot-air register in such a manner that the hot-air pipe shall pass through the waterchamber, sub stantially as set forth.

CHARLES B. SAWYER. Witnesses:

JAMES LAIRD, R. GAWLEIH 

